Emails send but no sent on date

We sent out a "email send" a couple of weeks ago and it hasn't come up with any analytic or even the emails that it sent.

Here are the setting of the email send:

• It does not link to a campaign
• It got an email template
• From record owner marked as no
• It has from name and from email
• The marketing list is a dynamic contact list capture all active member (The same list is use for other newsletter as well)

The email send has moved to the "Sent" box but "sent on date" is blank, all figures including "deliveries" and "opens" are 0. 

Look at the associated Email events, there are 37 records with the message "Request accepted. Beginning processing." All other emails cannot be found.

Please advise. Thanks!